Overview
The INA118UB is a precision, low-power instrumentation amplifier produced by Texas Instruments. It is designed to offer excellent accuracy and is suitable for a wide range of applications. The device features a versatile three op-amp design and is known for its low offset voltage, low drift, and high common-mode rejection ratio (CMRR). The INA118UB is ideal for battery-operated systems due to its low quiescent current and wide supply range.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Supply Voltage | ±2.25 | - | ±18 | V |
| Analog Input Voltage | - | - | ±40 | V |
| Offset Voltage (RTI) | - | - | 50 | µV |
| Offset Voltage Drift | - | - | 0.5 | µV/°C |
| Input Bias Current | - | - | 5 | nA |
| Common-Mode Rejection Ratio (CMRR) | 110 | - | - | dB (G = 1000) |
| Quiescent Current | - | - | 350 | µA |
| Operating Temperature Range | -40 | - | 85 | °C |
| Package Types | - | - | 8-Pin DIP, SO-8 | - |
Key Features
- Low offset voltage: 50 µV maximum
- Low drift: 0.5 µV/°C maximum
- Low input bias current: 5 nA maximum
- High CMRR: 110 dB minimum at G = 1000
- Inputs protected to ±40 V
- Wide supply range: ±2.25 to ±18 V
- Low quiescent current: 350 µA
- Available in 8-pin plastic DIP and SO-8 surface-mount packages
- Single external resistor sets any gain from 1 to 10000
- Internal input protection withstands up to ±40 V without damage
Applications
The INA118UB is suitable for a variety of applications, including medical devices, industrial control systems, and battery-operated equipment. Its low power consumption and high accuracy make it an excellent choice for systems requiring precise signal amplification. It is also used in data acquisition systems, test and measurement equipment, and other applications where low noise and high CMRR are critical.
Q & A
- What is the maximum offset voltage of the INA118UB?
The maximum offset voltage of the INA118UB is 50 µV. - What is the typical drift of the INA118UB?
The typical drift of the INA118UB is 0.5 µV/°C. - What is the maximum input bias current of the INA118UB?
The maximum input bias current of the INA118UB is 5 nA. - What is the CMRR of the INA118UB at a gain of 1000?
The CMRR of the INA118UB at a gain of 1000 is 110 dB minimum. - What is the quiescent current of the INA118UB?
The quiescent current of the INA118UB is 350 µA. - What are the available package types for the INA118UB?
The INA118UB is available in 8-pin plastic DIP and SO-8 surface-mount packages. - What is the operating temperature range of the INA118UB?
The operating temperature range of the INA118UB is –40°C to +85°C. - How is the gain set for the INA118UB?
The gain for the INA118UB is set using a single external resistor, allowing gains from 1 to 10000. - What is the maximum safe input voltage for the INA118UB?
The maximum safe input voltage for the INA118UB is ±40 V. - Is the INA118UB suitable for battery-operated systems?
Yes, the INA118UB is suitable for battery-operated systems due to its low power consumption and wide supply range.
